I think orinally, it was because intersite SCSI/FC was impossible or too expensive, while IP was "cheap". (Or maybe one TSM server had scsi tape drives and a second did not.) Virtual volumes are basically treating one TSM server as a "client" and archiving to the other TSM server over IP.
-----Original Message----- From: ADSM: Dist Stor Manager [mailto:[EMAIL PROTECTED] On Behalf Of Keith Arbogast Sent: Wednesday, August 22, 2007 4:35 PM To: ADSM-L@VM.MARIST.EDU Subject: Re: [ADSM-L] Why virtual volumes? Richard, You asked thought provoking questions, but didn't answer mine. What is the compelling reason to use virtual volumes? Offsite copypools and certain restorability of the TSM database are essential. Thank you for spotlighting those points. However, I can do those without virtual volumes. Right? What circumstances make virtual volumes helpful, preferable or necessary? TSM development designed and built them for a reason. What is the reason? This is not a rhetorical question. I am hoping someone will turn this light bulb on for me. With best wishes, Keith Arbogast
